Cold Frame Temperatures

I'm going to keep tabs on the forecast, and how it affects the temperature recorded in my garden, and within my cold frame.

I'm using the BBC's Weather Forecast.

DateForecast
Minimum(°C)
Cold Frame
Minimum °C)
Outside
Minimum (°C)
7th Apr63.5?
8th98.2?
9th76.5 6
10th530
11th641.5
12th642
13th653
14th43.51
15th231
16th631.5
17th664
18th76.54.5
19th6
20th?4.52
21st653.5
22nd77.56
23rd786
24th763
25th99.57.5
26th1098
27th8